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Titov E, Beqiraj A. Exciton States of Azobenzene Aggregates: A First‐Principles Study. Advcd Theory and Sims 2023. [DOI: 10.1002/adts.202200907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
Affiliation(s)
- Evgenii Titov
- University of Potsdam, Institute of Chemistry, Theoretical Chemistry Karl‐Liebknecht‐Straße 24‐25 14476 Potsdam Germany
| | - Alkit Beqiraj
- University of Potsdam, Institute of Chemistry, Theoretical Chemistry Karl‐Liebknecht‐Straße 24‐25 14476 Potsdam Germany
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Balischewski C, Bhattacharyya B, Sperlich E, Günter C, Beqiraj A, Klamroth T, Behrens K, Mies S, Kelling A, Lubahn S, Holtzheimer L, Nitschke A, Taubert A. Tetrahalidometallate(II) Ionic Liquids with More than One Metal: The Effect of Bromide versus Chloride. Chemistry 2022; 28:e202201068. [PMID: 35789121 PMCID: PMC9826293 DOI: 10.1002/chem.202201068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Indexed: 01/11/2023]
Abstract
Fifteen N-butylpyridinium salts - five monometallic [C4 Py]2 [MBr4 ] and ten bimetallic [C4 Py]2 [M0.5 a M0.5 b Br4 ] (M=Co, Cu, Mn, Ni, Zn) - were synthesized, and their structures and thermal and electrochemical properties were studied. All the compounds are ionic liquids (ILs) with melting points between 64 and 101 °C. Powder and single-crystal X-ray diffraction show that all ILs are isostructural. The electrochemical stability windows of the ILs are between 2 and 3 V. The conductivities at room temperature are between 10-5 and 10-6 S cm-1 . At elevated temperatures, the conductivities reach up to 10-4 S cm-1 at 70 °C. The structures and properties of the current bromide-based ILs were also compared with those of previous examples using chloride ligands, which illustrated differences and similarities between the two groups of ILs.
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Affiliation(s)
| | | | - Eric Sperlich
- Institute of ChemistryUniversity of Potsdam14476PotsdamGermany
| | - Christina Günter
- Institute of GeosciencesUniversity of Potsdam14476PotsdamGermany
| | - Alkit Beqiraj
- Institute of ChemistryUniversity of Potsdam14476PotsdamGermany
| | | | - Karsten Behrens
- Institute of ChemistryUniversity of Potsdam14476PotsdamGermany
| | - Stefan Mies
- Institute of ChemistryUniversity of Potsdam14476PotsdamGermany
| | | | - Susanne Lubahn
- Institute of ChemistryUniversity of Potsdam14476PotsdamGermany
| | - Lea Holtzheimer
- Institute of ChemistryUniversity of Potsdam14476PotsdamGermany
| | - Anne Nitschke
- Institute of ChemistryUniversity of Potsdam14476PotsdamGermany
| | - Andreas Taubert
- Institute of ChemistryUniversity of Potsdam14476PotsdamGermany
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Penschke C, Edler von Zander R, Beqiraj A, Zehle A, Jahn N, Neumann R, Saalfrank P. Water on porous, nitrogen-containing layered carbon materials: The performance of computational model chemistries. Phys Chem Chem Phys 2022; 24:14709-14726. [DOI: 10.1039/d2cp00657j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Porous, layered materials containing sp2-hybridized carbon and nitrogen atoms, offer through their tunable properties, a versatile route towards tailormade catalysts for electrochemistry and photochemistry. A key molecule interacting with these...
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Balischewski C, Choi H, Behrens K, Beqiraj A, Körzdörfer T, Geßner A, Wedel A, Taubert A. Metal Sulfide Nanoparticle Synthesis with Ionic Liquids - State of the Art and Future Perspectives. ChemistryOpen 2021; 10:272-295. [PMID: 33751846 PMCID: PMC7944564 DOI: 10.1002/open.202000357] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 02/12/2021] [Indexed: 11/10/2022] Open
Abstract
Metal sulfides are among the most promising materials for a wide variety of technologically relevant applications ranging from energy to environment and beyond. Incidentally, ionic liquids (ILs) have been among the top research subjects for the same applications and also for inorganic materials synthesis. As a result, the exploitation of the peculiar properties of ILs for metal sulfide synthesis could provide attractive new avenues for the generation of new, highly specific metal sulfides for numerous applications. This article therefore describes current developments in metal sulfide nanoparticle synthesis as exemplified by a number of highlight examples. Moreover, the article demonstrates how ILs have been used in metal sulfide synthesis and discusses the benefits of using ILs over more traditional approaches. Finally, the article demonstrates some technological challenges and how ILs could be used to further advance the production and specific property engineering of metal sulfide nanomaterials, again based on a number of selected examples.
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Affiliation(s)
- Christian Balischewski
- Institute of ChemistryUniversity of PotsdamKarl-Liebknecht-Str. 24–2514476PotsdamGermany
| | - Hyung‐Seok Choi
- Fraunhofer Institute for Applied Polymer Research (IAP)Functional Materials and Devices/Functional Polymer SystemsGeiselbergstrasse 6914476Potsdam-GolmGermany
| | - Karsten Behrens
- Institute of ChemistryUniversity of PotsdamKarl-Liebknecht-Str. 24–2514476PotsdamGermany
| | - Alkit Beqiraj
- Institute of ChemistryUniversity of PotsdamKarl-Liebknecht-Str. 24–2514476PotsdamGermany
| | - Thomas Körzdörfer
- Institute of ChemistryUniversity of PotsdamKarl-Liebknecht-Str. 24–2514476PotsdamGermany
| | - André Geßner
- Fraunhofer Institute for Applied Polymer Research (IAP)Functional Materials and Devices/Functional Polymer SystemsGeiselbergstrasse 6914476Potsdam-GolmGermany
| | - Armin Wedel
- Fraunhofer Institute for Applied Polymer Research (IAP)Functional Materials and Devices/Functional Polymer SystemsGeiselbergstrasse 6914476Potsdam-GolmGermany
| | - Andreas Taubert
- Institute of ChemistryUniversity of PotsdamKarl-Liebknecht-Str. 24–2514476PotsdamGermany
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Shirka E, Doko A, Paparisto V, Osmenaj R, Gjergo H, Demiraj A, Kacani A, Prendi B, Beqiraj A, Rrapo A, Goda A. P1460 Atrial myxoma with atypical location in an asymptomatic patient. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Primary cardiac tumours are rare. Most of them are benign, among which myxomas are the most common. Usually they occur in the left atrium (75%) but there are cases of right atrial myxomas. The majority of patients with atrial myxoma present with one or more symptoms of clinical triad of embolic events, intracardiac obstruction, or nonspecific manifestations. We report a rare case of cardiac myxoma arising from the right atrium as an accidental finding during routine medical checkup.
Case report
A 52 years-old woman was admitted to ambulatory care for a general checkup. At presentation, her heart rate was 82 bpm, regular and blood pressure was 150/90 mmHg. Other investigative results were normal. Her ECG showed normal sinus rhythm. She was sent for a routine echocardiography to judge for further treatment of the arterial hypertension. Transthoracic echocardiogram showed normal left ventricular ejection fraction. There was a mobile echogenic mass of nearly 6 cm2 in the right atrium, prolapsing through the tricuspid valve with mild tricuspid regurgitation without causing obstruction and protruding into the inferior vena cava (IVC). The transesophageal echocardiographic examination confirmed the presence of a mobile multilobular mass in the right atrial free wall close to the IVC origin.
A total body angio-CT scan showed an intraatrial mass measuring approximately 5 × 4 cm, without infiltration of the adjacent structures, suggesting the diagnosis of myxoma. Coronary angiography revealed normal coronary arteries. The patient underwent median sternotomy under general anesthesia. The tumor was completely excised through a right atriotomy. The resected mass was sent for histological assessment which confirmed the diagnosis of myxoma.
Discussion
RA myxomas usually originate in the fossa ovalis or base of the interatrial septum, but in this case, the myxoma was implanted in the atrial inferior vena cava junction. Myxomas are usually polypoid and pedunculated tumors (approximately 83% of cases). In this report, our patient had a solitary, pedunculated mass with polypoid areas and a lobulated surface. Echocardiography remains the best diagnostic method for locating and assessing the extent of myxomas and for detecting their recurrence, with a sensitivity of up to 100%. However, transthoracic echocardiogram may not identify tumors smaller than 5 mm in diameter, and a transesophageal echocardiogram is required when there is suspicion of a very small tumor. In this case, an echocardiogram suggested the hypothesis of RA myxoma, which was confirmed by a histopathological exam. Myxomas are friable with high chance of systemic or pulmonary embolization depending on tumour location. Early diagnosis and timely surgical resection is the treatment of choice to prevent possible fatal consequences such as sudden death.
Abstract P1460 Figure. Right Atrial Myxoma
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Affiliation(s)
- E Shirka
- University Hospital Center Mother Theresa, Tirana, Albania
| | - A Doko
- University Hospital Center Mother Theresa, Tirana, Albania
| | - V Paparisto
- University Hospital Center Mother Theresa, Tirana, Albania
| | - R Osmenaj
- University Hospital Center Mother Theresa, Tirana, Albania
| | - H Gjergo
- University Hospital Center Mother Theresa, Tirana, Albania
| | - A Demiraj
- University Hospital Center Mother Theresa, Tirana, Albania
| | - A Kacani
- University Hospital Center Mother Theresa, Tirana, Albania
| | - B Prendi
- University Hospital Center Mother Theresa, Tirana, Albania
| | - A Beqiraj
- University Hospital Center Mother Theresa, Tirana, Albania
| | - A Rrapo
- University Hospital Center Mother Theresa, Tirana, Albania
| | - A Goda
- University Hospital Center Mother Theresa, Tirana, Albania
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